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AutofillLoginPromptViewController.swift
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AutofillLoginPromptViewController.swift
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//
// AutofillLoginPromptViewController.swift
// DuckDuckGo
//
// Copyright © 2022 DuckDuckGo. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import UIKit
import SwiftUI
import LocalAuthentication
import BrowserServicesKit
import Core
class AutofillLoginPromptViewController: UIViewController {
typealias AutofillLoginPromptViewControllerCompletion = (_ account: SecureVaultModels.WebsiteAccount?,
_ showExpanded: Bool) -> Void
let completion: AutofillLoginPromptViewControllerCompletion?
private let accounts: AccountMatches
private let domain: String
private let trigger: AutofillUserScript.GetTriggerType
internal init(accounts: AccountMatches,
domain: String,
trigger: AutofillUserScript.GetTriggerType,
completion: AutofillLoginPromptViewControllerCompletion? = nil) {
self.accounts = accounts
self.domain = domain
self.trigger = trigger
self.completion = completion
super.init(nibName: nil, bundle: nil)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
setupView()
}
private func setupView() {
view.backgroundColor = UIColor(named: "AutofillPromptLargeBackground")
let viewModel = AutofillLoginPromptViewModel(accounts: accounts, domain: domain, isExpanded: isExpanded)
viewModel.delegate = self
let view = AutofillLoginPromptView(viewModel: viewModel)
let controller = UIHostingController(rootView: view)
controller.view.backgroundColor = .clear
presentationController?.delegate = self
installChildViewController(controller)
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if trigger == AutofillUserScript.GetTriggerType.autoprompt {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineAutopromptDisplayed)
} else {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineManualDisplayed)
}
}
private var isExpanded: Bool {
if #available(iOS 16.0, *) {
return true
}
if #available(iOS 15.0, *),
let presentationController = presentationController as? UISheetPresentationController {
if presentationController.selectedDetentIdentifier == nil &&
presentationController.detents.contains(.medium()) {
return false
} else if presentationController.selectedDetentIdentifier == .medium {
return false
}
}
return true
}
}
extension AutofillLoginPromptViewController: UISheetPresentationControllerDelegate {
func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
if self.trigger == AutofillUserScript.GetTriggerType.autoprompt {
Pixel.fire(pixel: .autofillLoginsAutopromptDismissed)
} else {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineManualDismissed)
}
completion?(nil, false)
}
}
extension AutofillLoginPromptViewController: AutofillLoginPromptViewModelDelegate {
func autofillLoginPromptViewModel(_ viewModel: AutofillLoginPromptViewModel, didSelectAccount account: SecureVaultModels.WebsiteAccount) {
if trigger == AutofillUserScript.GetTriggerType.autoprompt {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineAutopromptConfirmed)
} else {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineManualConfirmed)
}
if AppDependencyProvider.shared.autofillLoginSession.isSessionValid {
dismiss(animated: true, completion: nil)
completion?(account, false)
return
}
let context = LAContext()
context.localizedCancelTitle = UserText.autofillLoginPromptAuthenticationCancelButton
let reason = UserText.autofillLoginPromptAuthenticationReason
context.localizedReason = reason
var error: NSError?
if context.canEvaluatePolicy(.deviceOwnerAuthentication, error: &error) {
let completion = self.completion
dismiss(animated: true, completion: nil)
let reason = reason
Pixel.fire(pixel: .autofillLoginsFillLoginInlineAuthenticationDeviceDisplayed)
context.evaluatePolicy(.deviceOwnerAuthentication, localizedReason: reason ) { success, error in
DispatchQueue.main.async {
if success {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineAuthenticationDeviceAuthAuthenticated)
AppDependencyProvider.shared.autofillLoginSession.startSession()
completion?(account, false)
} else {
if let error = error as? NSError, error.code == LAError.userCancel.rawValue {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineAuthenticationDeviceAuthCancelled)
} else {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineAuthenticationDeviceAuthFailed)
}
print(error?.localizedDescription ?? "Failed to authenticate but error nil")
AppDependencyProvider.shared.autofillLoginSession.endSession()
completion?(nil, false)
}
}
}
} else {
// When system authentication isn't available, for now just fail silently
// This should never happen since we check for auth avaiablity before showing anything
// (or rarely if the user backgrounds the app, turns auth off, then comes back)
Pixel.fire(pixel: .autofillLoginsFillLoginInlineAuthenticationDeviceAuthUnavailable)
AppDependencyProvider.shared.autofillLoginSession.endSession()
dismiss(animated: true) {
self.completion?(nil, false)
}
}
}
func autofillLoginPromptViewModelDidCancel(_ viewModel: AutofillLoginPromptViewModel) {
dismiss(animated: true) {
if self.trigger == AutofillUserScript.GetTriggerType.autoprompt {
Pixel.fire(pixel: .autofillLoginsAutopromptDismissed)
} else {
Pixel.fire(pixel: .autofillLoginsFillLoginInlineManualDismissed)
}
self.completion?(nil, false)
}
}
func autofillLoginPromptViewModelDidRequestExpansion(_ viewModel: AutofillLoginPromptViewModel) {
if #available(iOS 15.0, *) {
dismiss(animated: true) {
self.completion?(nil, true)
}
}
}
func autofillLoginPromptViewModelDidResizeContent(_ viewModel: AutofillLoginPromptViewModel, contentHeight: CGFloat) {
if #available(iOS 16.0, *) {
if let sheetPresentationController = self.presentationController as? UISheetPresentationController {
sheetPresentationController.animateChanges {
sheetPresentationController.detents = [.custom(resolver: { _ in contentHeight })]
}
}
}
}
}